This will be my first IS Marauder (other than the Marauder II's). Moderately fast, full wubs, heat seems manageable. Good armor + AMS, and that ECM will really help with engagements past 200m. _
Alternative version with just wubs and taking out the MRM's, but it seems that the hardpoints might be a little light for running it without missiles: _
I'd drop a few DHS and the TC (it only affects the MPLs), and upgrade the MRM to a 30-tube version. _